Amphiphilic and cation-complexing compounds based on peptidoamines

Electrochemical Detection of Copper(II) at an Electrode Modified by a Carnosine–Silica Hybrid Material

“…Binding of Cu II to solution-phase carnosine has been extensively studied in order to assess the question of the functional groups involved in the Cu II chelation and on the species existing in the Cu II -carnosine system: monomeric and dimeric complexes can be formed depending on pH and ligand-to-copper ratio [37 ± 41]. To our best knowledge, however, no attempt was made so far to exploit the binding properties of carnosine when strongly immobilized on a solid support, except as part of pioneering works by our group demonstrating the possibility for silica-bound carnosine to trap Cu II from diluted solutions [45,46].…”

“…The copper(II)-carnosine system in aqueous solution was extensively studied and, even if various monomeric and dimeric complexes have been reported as a function of pH and carnosine-to-Cu II ratio, the exact nature of complexes in solution is still a matter of debate [37 ± 41]. Actually, no data are available to describe the chemical form of this(these) complex(es) when carnosine is immobilized by covalent bonding in a silicate matrix, as this kind of solid was only briefly studied [45,46]. No attempt was made here to characterize the nature of the complex, as this is not the purpose of the present investigation, but one can reasonably assume that monomeric (1:1) complexes are mainly involved because of steric hindrance that would limit the formation of dimeric species within the material.…”

Efficient synthesis of new perfluorinated or hybrid amphiphilic surfactants

“…Recently, we have published the synthesis of the perfluorinated monoalkylchain derivatives of peptidoamines and their surfactant and complexing properties [19][20][21][22]. This present paper reports the synthesis of bialkylchain perfluorinated analogues of peptidoamines with (hybrid compounds; structure I) or without perhydrogenated chain (perfluorinated bicatenar surfactants; structure II) (Scheme 1).…”

Molecular Tailored Histidine‐Based Complexing Surfactants: From Micelles to Hydrogels

“…On the basis of anterior results on peptidoamines and surfactants with complexing properties, [16][17][18] this study concerns the synthesis and the physicochemical characterization of trimodulus compounds, designed as AA-EO mAlk n , bearing (i) a hydrophobic alkyl group, (ii) a polar peptide group with complexing properties, and (iii) a variable hydrophilic junction modulus, allowing HLB (Hydrophilic Lipophilic Balance) control. Depending on the junction type between these moduli, ester or amide, three types of compounds were synthesized: amide-ester AA-His-a-EO me-C n , ester-amide AA-His-e-EO m -a-C n , and amide-amide AA-His-a-EO m -a-C n .…”